2564540 has 24 divisors (see below), whose sum is σ = 5875632. Its totient is φ = 932480.

The previous prime is 2564539. The next prime is 2564561. The reversal of 2564540 is 454652.

2564540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5609 + ... + 6048.

It is an arithmetic number, because the mean of its divisors is an integer number (244818).

2^2564540 is an apocalyptic number.

2564540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2564540 is an abundant number, since it is smaller than the sum of its proper divisors (3311092).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2564540 is a wasteful number, since it uses less digits than its factorization.

2564540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11677 (or 11675 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 2564540 is about 1601.4181215410. The cubic root of 2564540 is about 136.8788955891.

The spelling of 2564540 in words is "two million, five hundred sixty-four thousand, five hundred forty".